Improvement in fire-alarm registers



D. L. PIERCE & F. W. GRISWULD.'

Fire-Alarm Regsister.

N0,]67,H6 PatentedAug.24,1875.

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FIDJI WITNESSES. D n o Y' lNvENTnRs I MS QM2/@ l l {gD/(M Ll/ f //MQW/GZM@ N.PE\'ERS. PNOTUTMoGnA'PHER, WASHINGTON, D C,

UNITED S'rn'rns PATENT QEErcE.

DEXTER L. PIERCE AND FRANK W. GRISWOLD, OF PROVIDENCE, RHODE ISLAND.

IMPROVMENT IN FIRE-ALARM REGISTERS.

Specification forming part of Letters Patent No. 167,116, dated August24, 1875; application filed July 22, 1875.

To all whom it may concern:

Be it known that we, DEXTER L. PIERCE and FRANK W. GRrswoLD, both ofProvidence, in the State of Rhode Island, have invented a new andImproved Fire-Alarm Register and we do hereby declare that the followingspecification, taken in connection with the drawing, making a part ofthesame, is a full, clear, and exact description thereof.

Figure l is a front elevation of our invention. Fig. 2 is a side view ofthe same. 3 and 4 are detached parts of the same.

The object of our invention is to produce a fire-alarm register, whichshall record the number of the box from which the alarm proceeds, infigures; and consists in the mechanism for that purpose hereinafterdescribed, combined with and operated by the fire alarm mechanism now inuse.

The parts of the fire-alarm mechanism now in use, and shown in Figs. land 2 of the drawing, are the coil A, the arm B, catchlever C, ratchetwheel D, and cog wheel E. The opening of the circuit causes thevibration of the arm B and releases the catch-lever C, which revolvesthrough the action of the weighted cog-wheel E, and communicates motionto the hammer, which delivers its blow upon the gong.

Our recording mechanism, which we will now proceed to describe, isconnected with the alarm mechanism, from which it receives its motivepower.

F is a face-plate, having three rectangular apertures, G, in the rear ofeach of which is a series of rectangular plates, H, held inperpendicular guides I, and numbered upon their face from one to nineconsecutively, the front plate being a blank, and the rear onestationary. Each series of numbered plates H is held in a positioncovering its respective aperture G by a cross -bar, J, attached to andat right angles with a lever, K, the latter being secured to the faceplate and held in a perpendicular position by a spring. The levers K areeach provided with a rack, L, at-I tached to their lower extremity andat right angles thereto, upon which works a pin, M, upon thedouble-armed lever N. the latter being actuated by the rod O, to whichan upward motion is imparted in the manner hereinafter described. Onearm of the leverN is held under the rod P, whichvcauses the other armand pin M to throw back the rack L, and, consequently, the lever K andcross-bar J, with'each upward movement of the rod O, a distance equal tothe thickness of one of the plates H, which, being thus released, slidesdownward in its guides, and exposes the number upon the next plate. atedby the rod Q, which works through a sleeve, R, and is attached to thecatch hook S. The rod Q is carried forward so as to strike either of therods O by a spring upon the wheel T, the latter' being connected withthe sleeve R, the movement of the wheel T being controlled by the actionof the catch hook S upon the lever U through the pinion V. Upon the sameshaft with the catch-hook S is a pin ion, WV, into which works the cogwheel E of the alarm mechanism.

Having described the different parts of the alarm and registeringmechanisms, and shown their connections with eac-h other, it remains forus to show the operation of our invention, which is as follows:

As the cog-wheel E moves forward, as described, it rotates through thepinion N the catch-hook S,which raises the rod Q, as shown in Fig. 4,until it strikes ,the rod O and re leases one of the first series ofplates, H, in

the manner already set forth, when it stops. Snpposing, for the sake ofillustration, the number ofthe box from which the alarm pro- .ceeds tobe 327. The hook S, after a short pause,

rotates-again in time to catch and turn back the lever U, which carriesback the rod Q to its former position, and causes it again to strike andraise the same rod O, which exposes Fig. 2 5 the same operation beingrepeated to present Fig. 3. The hook S, at each of the last tworotations described, moves back thelever U, and, consequently, the wheelT and rod Q, a dist-ance equal to that which it moves forward during thetime the lever U is free, thus compelling the rod Q to strike and raisethree times in succession the rod O. At the completion of the thirdstroke the hook S pauses double the time and arrests the lever U uponits second revolution instead of the first', as

The rod O is actubefore. Duringvthis pause Y the rod Q will be carriedyforward 4as lthe-Wheel.T1-evolves asufoient distance to place the rodQin'a'posit'ion to strike and raise the next rod, which it does twice inthe same manner as before described,

th us exposing number two of the second series :of numbered plates. Thehook 1S isthen left in the same position as before, and duringvthelsecond interval the rod Q is brought to bear in the same manner upon thethird rod, and rotating seven times,=.as before, exposes "the number 7,thus completing the number of the box, viz, 327, after which the rod Qcontinues to movelfor-Ward a ysuftioientndistanoe itoiclear the thirdrod during the repetition of thel alarm. The speed of the wheel T isregulated by a suitable escapement and fan.

The mechanism having .110W performed its Work, .it remains yto set itfor-thenextalarm. The' plates are again Aplaced in vltheir lformerposition by raising the bar X, which carries them abovethe cross-bar J,which again drops` The-rod-Q is moved vback to itsv into place.

`original position, thel'everU beingoonstructed so as to snapby thepoints ofthe-hook S.

What We claim as our invention, and desire .to seeureby Letters Patent,is-

'l. The three series of numbered plates G, sliding in suitable guides,and so operated as lto designate the number of the boX struck.

2. The levers K, having a cross bar, J, and rack iL, in combinationvrwith fthe -lever Nfand :rod O, the Whole combined and operatingtogether, in the manner substantially as described, for the purposesspecified.

f3. 'Th'ehook-f'S,aetuated by the Wheel E, in combination Withl the rodQ, for the purpose of raising the rod O, in the manner and for thepurposes described.

VHet. The combination of the hook S, the rod Q, the Wheel T, and thelever U, the Whole arranged and operating together in the mannersubstantially as described.

DEXTER L. PIERCE. EEANK W. GEIsWoLD.

Witnesses:

WALTER yB. VINCENT, J. T. RICH.

